| 摘要 |
PURPOSE: A concrete pipe, having an inside protecting liner within, and a method for manufacturing the same are provided to prevent the inside hole surface of the concrete pipe from being corroded by the chemical materials(sulfuric acid, etc.) which are contained in the sewage or waste water. CONSTITUTION: The method for manufacturing the concrete pipe, having an internal hole, includes steps of: cutting(100) both sides of the prepared synthetic resin sheet plate to the shorter size than the circumferential length of the internal hole and the front and rear end identically to the length of the front and rear length of the internal hole; manufacturing(101) a connection lattice plate, whose both sides have a groove corresponding to the thickness of the sheet plate and also whose center has a longitudinal groove; manufacturing(102) a cylindrical coating lining; inserting(103) the coating lining; pouring and forming(104) a concrete; and removing(105) the concrete pipe from the metal mold after hardening it during the determined time. |
